How do I make a group of .RAR files with OSX?

I want to split a disc image into 100 meg parts so I can move it to another machine (No cables of anything else, I have to do it like this). I used to do it on Windows with WinRAR, but I've got nothing to do it with OSX. I found something I can use with the terminal, but I'm at a loss with that thing. Anyone got something I can use?

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